Table 7 Summary Comparison of selected Refractory Gold processes for Ore A Summary Comparison of Selected Refractory Gold Processes for Ore A OPTION 1 2 Bacterial Heap UFM Con Oxidation Concentrate Whole Ore PROCESS Plant Design Data Ore Processed Concentrate Production Au in Feed S in Feed CO3 in Process Feed t / yr t / yr oz / yr t / yr t
refractory carbonaceous sulfide ore is at Barrick s Goldstrike Mine where gold occurs in pyrite in refractory sulfide ore and double refractory sulfidic/ carbonaceous ore These ores are pretreated by autoclave and roaster prior to cyanide leaching Thomas et al 2000; Wickens et al 2003 In the Jinya Carlin type gold deposit in China gold
The Biological Oxidation BIOX® Process for the treatment of refractory gold ores was commercialized in 1988 During the last decade the technology has developed into a mature commercially viable process with five additional operations commissioned including operations at Sao Bento in Brazil Harbour Lights and Wiluna in Australia Ashanti in Ghana
What is claimed is 1 In a process for the recovery of gold from a refractory auriferous ore containing sulfide sulfur which ore may contain natural carbonate wherein a slurry of the ore is oxidized with oxygen gas under pressure in the presence of sulfuric acid the oxidized slurry is neutralized the neutralized slurry is cyanidized to leach gold therefrom and gold is
Overview of the Groveland Mine iron ore beneficiation process utilizing direct flotation in acidic conditions based on Houot 1983
Prior to cyanidation the application of alkaline sulphide pretreatment was seen to enhance Au recovery from 30% to 75% Ubaldini et al 2000a or from 49% to 78% of Au and from 18% to 91% of Ag
KEY WORDS arsenic bearing gold ore; pretreatment process; refractory gold ore 1 Introduction Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine Arsenic bearing refractory gold ore has stones extremely difficult to deal with In the stones
Cyanide leaching is the most widely applied leaching process in the case of refractory sulfide ores Ore concentrates are subjected to cyanide solutions at alkaline conditions pH ≈ 10 for 16 48 h and as a result gold is extracted in the form of Au CN 2 complex
As a pretreatment process of some ore types pyrometallurgical procedures including co smelting facilities the most cost effective and highly efficient procedure and oxidative roasting were utilized to pre treat refractory sulfide gold bearing concentrates before the 1980 and 1990 s Gorain et al 2016 Roasting destroys sulfide grains and
Generally the complex tin containing wolframite scheelite mixed ore is usually treated by the traditional soda boiling method and the alkaline decomposition method Li et al 1991; Wang and Nie 2004; He et al 2016 In the leaching process tungsten is leached into lixivium and a large proportion of tin remains in the decomposition residue that is recovered in
Microscopic gold inclusions in sulfide minerals cannot typically be extracted by conventional cyanidation The gold ore must be pretreated to oxidize sulfide minerals associated with gold and to remove other minerals and chemical compounds that interfere in the cyanidation leaching process The recovery of gold from refractory sulfidic carbonaceous ores after
In order to solve this problem a new technology combining mineral processing method with metallurgy technique is studied which is used to process this refractory ore that consists of sandstone
The refractory characteristics of this arsenopyritic gold ore was confirmed in a previous publication Mesa Espitia and Lapidus 2015 In the cyanide bottle roll test for the mineral concentrate the gold recovery was only 23% Therefore an alkaline pretreatment with NaOH solutions was studied showing better results
Download scientific diagram Magnetization roasting process of iron ores in the rotary kiln from publication Recent Advances in Magnetization Roasting of Refractory Iron Ores A Technological
Refractory gold ore mainly refers to gold ore with a direct cyanide gold leaching rate of less than 80 % According to statistics such gold ores account for 60 % 70 % of all gold ores and about 30 % of the present total gold output is created by refractory gold ores Konadu et al 2020; Zhang et al 2018 There are significant variations in properties among different
Effect of nitric acid pre treatment on the extraction of silver from the ground ore d 80 50 µm in cyanide leaching Cyanidation conditions g/L NaCN pH 25 3 C flow rate of air 1
Building Materials Third Edition Moulding It is a process of giving a Neutral Refractory Bricks consist of chromite bricks 50 per cent chrome and iron ore containing 30 per cent iron
As a pre treatment method of refractory gold ore carbonaceous matter C matter flotation was investigated with multi stage flotation by rougher scavenger and cleaner stages Different dosages of kerosene and MIBC 4 Methyl 2 pentanol were applied and the optimum dosage was selected by testing in each flotation stage With the combination of each
We proposed a comprehensive procedure for the separation and recovery of antimony from the As Au Sb ore In this process antimony was recovered in a single step in the form of cathode antimony
necessary to extract gold from refractory ore and secondary sources [4 6] Refractory ore is gold ore whose leaching rate is less than 80% by conventional cyanide leaching after fine grinding It usually has complex impurity metal species The gold is wrapped with ore and cannot be exposed to a leaching solution by conventional grinding It
The clean production process for extracting antimony from refractory gold ore involves sodium sulfide leaching pressure oxidation concentration and crystallization steps First the stibnite in the refractory gold ore reacts with sodium sulfide and antimony is dissolved into the leaching solution in the form of sodium thioantimonite Eq 1
Pressure oxidation is a hydrometallurgical oxidative pretreatment for refractory ores such as sulfide ores Here simultaneous alkaline pressure oxidation and sodium cyanide leaching treatments were carried out on a pyritic ore from the Mulatos Mine located in Sahuaripa Sonora Mexico Mineral characterization agitation leaching hot cyanidation under
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